Fitness Basics: Strength Training, Better Health (cont.)

Strength training is especially important for dieters. When you lose weight, up to a quarter of the loss may come from muscle, which can slow your metabolism. Strength training helps you rebuild any muscle you lost by dieting -- or keep you from losing it in the first place.

Getting Started

So you're convinced of strength training's virtues. But just how do you go about getting started?

The weight room at the gym, with all the buff bodies and complicated-looking equipment, can be intimidating to a beginner. Indeed, for someone with back or joint pain, just picking up a weight might seem daunting. Then there's the issue of proper form: Without it, you could do more harm than good trying to build strength.

Your best bet when starting out, the experts say, is one-on-one help from a qualified fitness trainer -- whether it's a personal trainer you've hired, or an instructor at your gym. A trainer can address your personal goals and limitations and can help you with alignment and execution of each exercise.

"I can't tell you how many people I see with a knee injury because they were not taught correctly how to do a lunge or squat," says Sue Carver, physical therapist with A World of Difference Therapy Services in Little Rock, Ark.

Siebers also recommends checking out books, videos, and/or fitness- and health-related web sites for guidance on exercises and form.

Indeed, good technique, not heavy lifting, should be your primary goal in the beginning, Carver says.

Siebers recommends using a heavy enough weight to feel resistance, but not strain or pain. Your individual body will determine just how much that is, and you should err on the light side at first; five pounds may not seem like a lot, but it's better to be conservative than suffer.

And how much should you work out? According to the American College of Sports Medicine guidelines, beginners should do at least two days per week of any type of strength-training exercise. Your workout should consist of 8 to 12 repetitions each of 8 to 10 different exercises working all the major muscle groups -- chest, back, shoulders, arms, abdominals, and legs. (A repetition is how many times you lift the weight, pull the rubber tubing, do a pushup, or whatever.)

Machines or Free Weights?

Both free weights and weight machines work well, and experts say there's no evidence that one is superior to the other, so this is largely a matter of choice.

"Internet chat rooms and support groups really help to motivate."

Machines are a good idea for people who are overweight and/or out of condition, since the exercises are generally done seated and with back support, Seibers says.

But if machines are not an option, investing a few dollars in a set of light dumbbells and/or some resistance tubing can give you what you need to start toning those muscles.

Whichever option you choose, keep your moves basic at first, the experts say. For the arms and upper body, try these exercises: